1918944 has 48 divisors (see below), whose sum is σ = 5599440. Its totient is φ = 639360.

The previous prime is 1918933. The next prime is 1918967. The reversal of 1918944 is 4498191.

It is a tau number, because it is divible by the number of its divisors (48).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a nude number because it is divisible by every one of its digits.

It is a junction number, because it is equal to n+sod(n) for n = 1918899 and 1918908.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 247 + ... + 1974.

It is an arithmetic number, because the mean of its divisors is an integer number (116655).

2^1918944 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1918944, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2799720).

1918944 is an abundant number, since it is smaller than the sum of its proper divisors (3680496).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1918944 is a wasteful number, since it uses less digits than its factorization.

1918944 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2240 (or 2226 counting only the distinct ones).

The product of its digits is 10368, while the sum is 36.

The square root of 1918944 is about 1385.2595424685. The cubic root of 1918944 is about 124.2665096877.

The spelling of 1918944 in words is "one million, nine hundred eighteen thousand, nine hundred forty-four".